Firmware image for the Lenovo IBM ThinkPad T400 on the MLB3I-7 board, stated as a 4MB flash dump, delivered as a 3.94 MB RAR archive. A 4 MB image corresponds to a 32 Mbit SPI chip, so the chip on the board should be of that capacity. Such dumps are typically used to revive a ThinkPad that powers on without display or is stuck after a failed BIOS flash. Verify the board revision on the PCB, back up the existing chip contents with a programmer, and keep that copy in case the original data, including serial and UUID, is needed.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @biosarchive. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →